The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2009
Filed:
Jun. 17, 2008
Yasushi Yamamoto, Kishiwada, JP;
Yasushi Yamamoto, Kishiwada, JP;
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Abstract
A zoom lens system includes, in order from an object side: a first lens group having a negative optical power, a second lens group having a negative optical power, and, a third lens group having a positive optical power. The position of the first lens group is fixed during zooming, and the third lens group includes three single lenses including, in order from the object side, a third-first lens being a single lens having a positive optical power, a third-second lens being a single lens having a negative optical power and a third-third lens being a single lens having a positive optical power. The zoom lens system satisfies the following conditional expression: 0.35<L/f<1.5 where Lrepresents the axial air gap distance between the third-second lens and the third-third lens and frepresents the focal length of the third lens group.